POINTING DEVICE AND METHOD WITH ERROR PREVENTION FEATURES

摘要

A pointing device (100) and method include a pad (104) occupying a region, a raised border (108) at a perimeter of the region and an object (102) slidably movable on the pad (104) for contacting the border. A detecting device (116) is configured to detect a physical contact by the object at any position on the border wherein contact with the border generates a signal indicating a contact position on the border.